摘要：Pine chars are prepared at different temperatures with and without KOH pretreatment. Their properties are characterized by thermogravimetric measurement, proximate and elemental analysis, N_2 physisorption, SEM, FT-IR, and the efficiency of NO removal is also measured. Three active metal oxides (V_2O_5, MnO_x and CuO) are then loaded on the chars via incipient-wetness impregnation method respectively, and their distribution on the pine chars and NO removal are studied as well. The results of N_2 physisorption and SEM show that elevating carbonization temperature is good for pores formation on pine chars, which is advantageous for NO removal. KOH pretreatment promotes pine carbonization and more pores are generated, and the surface acidity is also increased. It results in the better NO removal performance than the chars without KOH pretreatment. In both conditions, physisorption plays the crucial role and the efficiency of NO removal decreases drastically as testing temperature rising. After active metal oxides doping, the activity of pine chars is improved. KOH pretreatment makes the metal oxides distribute more uniformly on the pine char surface than that without KOH pretreatment, and higher NO removal is obtained on this catalyst. The optimal carbonization temperature for metal-containing catalysts is 600 °C and the order of activity performance follows CuO > V_2O_5 > MnO_x in the research.
